Bicycle frame



FIG. 1 is a side view of a bicycle frame showing my new design, theopposite side being a mirror image thereof;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a perspective view thereof.

The ornamental design for a bicycle frame, as shown and described.